$\frac{3}{5}m^2-2mn+\frac{1}{10}m^2-\frac{1}{3}mn+2mn-2mx^2$
$8x^2-2x+17$
$36x^2+81$
$18z-9d=75$
$\frac{7x^8}{8}-3x^2+c$
$\int\left(2\sqrt{x}-\sqrt[3]{x}\right)dx$
$\left(-7ab^4c\right)^3\left(\left(2a^2c\right)^2\right)^3$
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